What does "some form of specialization" mean in the context?
Before "the market" took on the sense of an impersonal, global mechanism by which supply meets demand at some equilibrium price, the market was a physical place where buyers and sellers meet face to face to exchange goods. Shopping is, at its best, both an end and a means. It is a means for people to acquire the goods needed (or wanted) for living. Unless we were in a society where people produced everything for themselves, some form of specialization and trading is necessary. Shopping in some form is thus a necessary activity. We can say more than that, however. Meeting in the marketplace to exchange goods can be a healthy and humane activity that is valuable for its own sake. That is, shopping is not just a means toward meeting needs. Instead, it is a social activity, whereby people meet and interact. Shopping can help meet the need for human sociability.